Heavily embossed. Degree of embossing is greater than average and colors
appear to be airbrushed rather than printed realistically. Sometimes
has a flat paper backing.

Hold-to light. Usually means multilayerd postcards
with parts of the top layer cut out. When the card is held to the light,
the
cut-out
areas (such as a windows, lights, sun, or moon) appear illuminated.
Another type has oiled sections that transmit the light.

Installment set. A set of individual postcards that form a larger picture
when placed side by side.

Large letter. Outlines of large-lettered place
names are filled with images.